open loop

{"cid":"129889","pid":"23306419","pimg_url":"\/\/img1.tradegrowthhub.com\/df\/8f\/4c7f9dc47dba\/product\/79454483_s-w400xh400.jpg","name":"Rtelligent NEMA 34 Shaft Dia 14mm 4 Lead 8.5NM Stepper Motor 86A8S4-14 With Stepper Motor Driver DMA860H DM860 Kit 86A8S4-14","attrs":{"Price":"$82.50(1 - 14 Sets) $75.00(>=15 Sets)","MOQ":"1 Set","Delivery Time":"Negotiable","Brand":"Rtelligent"}}